Elevator



(No Modl.) W. GODDARD,

ELEVATOR. V No. 275,037. I Patented Apr. 3, 1883. f A

ATTORNEYS.

UNITED STATES Erica.

\VILLIAM GODDARD, OF CHESTER, ILLINOIS.

ELEVATOR.

SPECIFICATION forming part Of Letters Patent No. 275,037, dated April 3,1883.

Application filed January 27, 1883. (No model.)

To all whom it may concern Be it known that I, WILLIAM GODDARD, ofChester, in the county of Randolph and State of Illinois, have inventedcertain new and useful Improvements in Elevators, of which the followingis a full, clear, and exact description.

This invention relates to the suspension of the cage of an elevator byor through the instrumentality of cams or cam-levers which are subjectto spring control, and so connected with the hoisting rope or chain andarranged in relation with guides or uprights thatincase of the breakageof the hoisting-rope the cams will be thrownintogrip or holdontheuprights to keep the cage from falling; and my invention consists incertain novel combinations and arrangements of said means and devicesimmediately connected therewith whereby greater simplicity andefficiency are obtained, substantially as hereinafter described.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figures 1 and 2 are side elevations, in planes at right angles with eachother, of an elevator in part having my invention applied and Fig. 3, avertical section in part on the line .r .r in Fig. 2.

A'Aindicate two opposite side fixed uprights or posts, which may serveas guides for the cage B. Firmly secured to the upper portions of theframe of the cage B are opposite side head pieces, .b I), each of whichis a solid metal plate, and which serve in a very strong and efficientmanner to resist the strain of the automatic gripping device on theuprights A Ain case of the breakage of the hoisting-rope of the cage, ashereinbefore referred to. These said headpieces form bearings for theparallel crossshafts O O of the gripping devices. Upon the opposite endsof these shafts are the cams or cam-levers d d, which, as in othersafety contrivances of like kind, may be serrated on those portions oftheir peripheries or outer surfaces that in case of breakage of thehoisting-rope grip or take hold on opposite side edges of each upright AA. Each of these shafts 0 O has projecting upwardly from it, near eitherend, arms orlevers ee, which are connected on opposite sides of theelevator-that is, each to the hoisting-rope D or swivel thereof. Thisconnection is established by means of opposite side suspension slings orchains, E E, and by it w the cage is effectually balanced. The shafts UC are connected on opposite sidesof theiraxes to the arms 60, and onopposite sides of the cage by springs g g, which, as. thus arranged, arekept distended so long as the cage B is suspended from thehoisting-rope, but which, on breakage of the hoisting-rope, collapse andexert their tension to turn the shafts O O andinduce or produce grip ofthe cams d d on the posts A A to hold the cage from falling. If desired,the shafts 0 0 may be connected on the reverse sides of their axes bysprings, which, instead of being distended when the cage is suspendedfrom the hoisting-rope, are compressed and relax to produce the grip onthe posts; or both forms of springs may be used. A single description orarrangementof springs, however, such as shown, it is believed will befound all-sufficient.

By the arrangement and construction of parts as 'shown it will beobserved that no matter how much weight is put upon the cage thecross-shafts O O are limited in their turningmotion to a straightposition of the levers c cin linewith the chainsE E, attachedtothem,thus relieving the springs g g of any further strain, which protectsthem from breakage. By employing two or more springs, too, and makingeach one sut'ficient; to do the whole work, the safety action of thedevice will not be destroyed by the breakage of one of them. To relievethe springs of strain when the cage is lowered and at rest, recesses h hare formed in opposite sides of the lower portions of the uprights A A,into which the cams d (I enter by the action of the springs gg. Asarranged and constructed, the safety device becomes a part of the cageitself, and not a more attachment. Its action, too, is a direct one. Thelateral springs g y will be always in sight of the operator, and may bereadily puton or taken on, as required also, being arranged overhead,are not liable to come in contact with any person or body on the cage,as a single central spring mounted on the platform of the cage to IOCoperate the cams, as in other arrangements, is 2. The fixed uprights AA,provided with reapt to do. cesses h h in their opposite sides,incombina- I am aware that it is not new to combine tion with the cage B,the cam-shafts O C and r5 jointed arms, snspendingrods, ways, bclltheirattached cams d d, and the springs g g,

5 crank levers, links, eyebolts, rods. eccentrics, substantially as andfor the purpose herein set and springs with the suspension-chains; butforth.

What I claim as new and of myinvention is 1. The head-pieces b b,fprn1edof solid metal l WILLIAM GODDARD. plate, and arranged opposite to eachother on 10 the frame to form bearings for the cross-shafts Witnesses:

of the gripping devices, guides for the cage, RALPH E. SPRIGG, and totake the strain as described. 1 J. H, LINDSEY.

